Engine



1. 0. CARREY.

ENGINE.

APPLICATION FILED IIIAII. 27, I9'I9.

l ,344, 3 3 l Patented June 22, 1920.

2 SHEETS-"SHEET 2.

UNITED STATES PATENT OFFICE.

JOHN CARREY, OF'ST. LOUIS, MISSOURI, ASSIGNOR TO CARREY ROTARY ENGINE COMPANY, or sT. LOUIS,

MISSOURl, A CORPORATION 0F MISSOURI.

ENGINE.

Patented June 22, 1920.

Original application led February 14, 1919, Serial No. 276,995. Divided and this application led March 27, 1919. Serial No. 285,477.

To all 'whom it may concern:

Be it known that I JOHN O CARREY, a citizen of the United States, residing at the city of St. Louis and State of Missourifhavc invented a newV and useful Engine, of which the following is a specification.

This invention relates to engines.

An object of the invention is to provlde an improved engine of the rotary type comprising intermeshing rotary members of novel construction, in combination with mechanism driven thereby for supplying water or other fluid'to maintain a seal between thesurfaces of the rotors and the adjacent walls of the chambers in which they are inclosed.

Another object of the invention is to provide an engine of the character mentioned having an air pump comprising intermeshing rotary members and means for utilizing a part of the water to maintain a close seal between the surfaces ofthe pump members and the :adjacent walls of the chambers in which they are inclosed.

Another object of the invention is to provide an engine of the character described constructed to utilize the circulating water to cool the operating parts of the engine.

Other objects will' appearl from the following description refe ence being made to the drawings, in which- Figure 1 is a sectional view of the engine casing showing the arrangement of the operating parts Of the engine.

ig. 2 is a cross sectional view on the line 2-2 of Fig. 1.

Fig. 3 is` a cross sectional view on the line Fig. 4 isa cross sectional view 4 4 of Fig. 1.

Fig. 5 is across sectlonal view on the line on the line of the arrows 7-7.

Fig. 8 is an enlarged end elevation one I. of the rotors.

Fig. 9 is a sectional View showing the construction by which the water is supplied to of the subJect matter of my said a herein. It is sufficient for present the water seal pockets in the the engine rotors and in the pump members.

Fig. 10` is a sectional view showing the construction of one of the packing and partition members of the' engine. i

Fig. 11 is a view showing the arrangement of the water seal pockets in the peripheral edges of the pump member teeth. This application is a division of my prior application' Serial No.276,995, tiled Februarylfl, 1919. The engine includes an Outer casing l inclosing two nearly cylindrical cases 2 which, as shown, may be cast integral with the casing 1 and which inclose some ofthe principal operating parts of the engine mechamsm. 4 The casing thus formed has an end wall 3 which-may be integral with the casing'as shown. The opposite end of the casing is closed by a wall 4. A` member 5 is secured to the wall 3 and has an appropriate chamber formed therein to contaln a part of the peripheries of the peripheries of engine mechanism comprising the .gear

wheels 6, the operation and function of which are clearly 'described in my said application lSerial No. 276,995, and which do not require further description herein.

The shaft 7 is journaled in the end walls of the engine casing. and extends concentrically through one of the cylindrical chambers in the casing. A shaft 8 is also jour- -naled in the end walls of\the `casing and ex-l tends concentrically through the other cylindrical chamber parallel with the shaft 7 and is provided with means 9 for the trans-- mission of power. The two gears 6 previously mentioned are attached to the shafts 7 and 8, respectively.

In the specific form shown it is intended to actuate the piston by heat generated by combustion, the heat being admitted to the rotor chambers so that the rotors will be driven thereby. The combustion devices and fuel supply mechanism constitute a .art

ication Serial No. 276,995 andare not c p urposes to understand-that the rotors are riven in oppostegdirections. The subject-matter of aimed the present invention consists of the water clrculating means and water seal construction.

As shown in Fig. 2 water is delivered ,through a pipe 10 into a receiving chamber 11 from which the water is forced by the rotor pump members l2 into a chamber 13 which extends under the lpartition devices 14 forming one end wall of the chambers in which the pump members 12 operate. The water'is forced from the chamber 13 into' assages 15 which open into a passage 16 etween the outer and inner casings of the engine and which also have lateral openings 17 for deliverin water to the air pump members 18. Re erence is made to this construction at a later point in the specification.

From the passage 16 the water passes through passages 19 into a chamber 20 formed in the end wall 4 of the engine. From the chamber 20 the water passes through passages 21 opening into the chambers in which the rotors 22 are mounted.

The rotors 22 are securedto the shafts 7- and 8 respectively.' Each of the rotors 22 is of the herring bone gear type and said rotors intermesh with each other, being driven in opposite directions in the manner 4described 1n my copending application and thereby driving the remaining mechanism of the engine. The rotors are in the form of cylin` ders having their outer ends against the ,wall 4 and their inner ends against`- the packing partition separating the rotors from the air pump members 18. Each of the rotors is formed with an annular series-of passages 23 (Figs. 6 and 8) which are brought successively into communication with the openings 21. As a result of this construction the water, which is maintained under constant pressure by the pump members 18, is forced into Y the passages 23. The water seal is maintained between the ends of the rotors and the wall 4, the same comprising annular grooves 24 (Fig. 7) in the end wall 4 having communication with and receiving water from the o enings 21. Similar annular grooves 25 klig. 6) are formed in the ends of the rotors and radial grooves-26 (Fig.`

8)*from the grooves 25 extend into the ends of the teeth of the rotors, as shown in Fig. 8.

The rotors are se arated from the pump members b` a yiel in partition, the con-l struction o which will understood by referenceto Fig. 10. As. shown the partition includes a Wall member 27 .closing the'two cylindrical chambers, andaa coperatin` wall member 28 connected-to the Awall mem dricalV flange 31 formed on the wall member 28. An impervious joint is formed by packing elements 32 carried in grooves in the sages 43.

r 27 by retaining screwsv 29, which permit movethe walls of the cylindrical .chambers andy forming an impervious joint.`

The walls 27 are formed with pockets 34 (Fig. 4) into communication with which the water passages 23 are successively brou ht. Annular rooves 35 are formed in the p ate 27, one osaid grooves being in each chamber. The grooves 35 are in communication withl and receive water from the pockets 34 so that a water seal is formed between the ends of the rotors and the end wall of the chambers in which they operate similar to the water seal at the opposite end of the chambers, previously described.

Water seal pockets 36 are formed in the outer edges of the teeth of the rotors, the

'general construction. and arrangement of which will be understood by vreference to Figs. 9 and 11. Said pockets are preferably inclined relative to the teeth in which they are formed and overlap, although they do not open into or communicate directly with each other. Water is admitted into the pockets 36 through passages 37 communicating` with the passages 23.

ed toy water sealpockets 42 in the edges ofthe teeth of the pump members through pas- As the pump members rotate the passages 41 arebrought successivel into communication withl o nings 44 ig. 4)

through the partition 24-28. The passages 23 in the rotors, being brought successively into communication with the openings 44, receive the water therefrom 'and serve as discharge openings for conducting the water to the discharge openings 38.A Thus the rotors receive cold water from two diiferent sources. f

A pressure release valve 45 is mounted in a passage connecting the chamber 20 with the chamber 3.9,V so that the pressure of the water in the chamber 2 0 maybe relieved when the maximum desired pressure is exceeded. r

While I have described my invention as utilizing water as a sealing medium it will may be decomposed inthe gases, due to the i high temperature resulting from the operation' of the engine. The presence o the water seal prevents any escape or waste of the pressure.Vv l

It will be understood that the construction and arrangement described may be varied without departure from the principle` of the invention. What I claimvand desire to secure by Letters Patent, is

1. An engine comprising a casing, of intermeshing rotors within the casmg, passages throughtheqotors, chambers in the outer edges of the teeth of )the-rotors, a means for supplying liquid toy said chambers to form a water seal between the casing and teeth of the rotors.

2. The combination of a pair of rotors having intermeshing teeth on their periphcries, with passages in the rotors, chambers formed in the. peripheral portion of said teeth communicating with said passages and means for supplying fluid to saidpassages,

\ and thereby to said chambers to form seals around the rotors.

3. In. a rotary engine, a; pair of rotors, intermeshing teeth on the peripheries of the rotors respectively, passages through the rotors, chambers formed in vthe peripheral portions of said teeth communicating with said passages, and meansfor supplying fluid to said assages and thereby to said chambers to orm seals around the rotors.

, v4.A In aY rotaryl engine, an engine casing,

a pair of 'rotors in said casing,-intermeshing teeth on said rotors respectively, chambers *formed 'in the peripheral surfaces of said teeth," and means forsupplying fluid to said 'chambersto form seal "between said rotors and the walls of the casing in which the roj tors are mounted.

A5. In an engine, a casing, a palr of 'rotors mounted in said casing, intermeshing teeth ,the casing. n, n

7. In an' engine, an engine cas1ng, rotors' mounted in said casing, liquid seal chamon said rotors respectively, liquid chambers in` said teeth, passages for conducting f luld intov Jsaid chambers, and mechanism driven teeth on saidrotors, liquid` seal chambers in the eripheries of said rotors, passages for con ucting fluid into said chambers. and mechanism `for forcing.` fluid through said passages into said chambers for sealing the space between the teeth of said rotors and bers in the peripheries of said rotors, passages for conducting Huid intofsald chama pair through said device operated by the rotors for forcin uid through said passages into said cham rs to seal the spaces between said rotors and said casing, and a yielding end wall for said casing arranged to lcombers, a pump pensate for the expansion and contraction u of the rotors.

8. In an engine, an engine casing, rotors mounted in said. casing, liquid seal chambers in the peripheries 'of said rotors, passages for conducting fluid into said cham bers, a pump device operated by the rotors for forci fluid through said passages into said cham rs to seal the spaces between said rotors and said casing, a yielding end wall for said casing arranged to compensate for the expansion and contraction of l the rotors, and means for holdin the end wall pressed against the ends of t e rotors. 9. n an engine, a casing, rotors mounted in said casing, chambers in the peripheries of said rotors, passages for conducting fluid 'into said chambers, rotary pum members mounted in said casing, means or driving said pumpmembers by the rotors to force fluid through said passages into said chaml bers, and a yielding.partition in said casing between said rotors and said pump members arranged to compensatefor the,

said pump members by the rotors 4to force iluid through said passages into said chambers, a yielding partition in said casing between said rotors andI said pump members arranged to Icompensate for the expansion and contraction of said rotors, and means A for holdin said partition in contac'twith the ends o said rotors and said pump members.

11. In a rotary engine, a casing, rotors `mounted in said casin liquid seal chambers formed in the perip eries of said rotors, passages for conducting li uid into said chambers, rotary pump mem rs in the cas-v ing driven by said rotors to force liquid through said passages into said chambers a partition between said rotors and said pump members, and passages through said partltion for admittin liquid from .said pump members into sald rotors.

mounted in said casing, quid seal cham- In a rotary enginea casing,l rotors p Y u' bers formed in the peripheries of said rotors, passages for conducting liquid into said c ambers, rotary pump members in the casing driven by said rotors to force liquid through said passages into said chambers a partition. between said rotors and said pump members, assages through said partition for admitting liquid from said pump members into said rotors, and means for pressing said partition into contact with both the rotors and the pump members.

13. A rotary engine, comprising a casing, a pair of rotors mounted in the casing, intermeshing teeth on said rotors respectively, passages through said rotors respectively, liquid seal chambers formed in the outer edges-of said teeth, mechanism driven by the rotors for forcing liquid through said passages into said chambers, and liquid seal chambers at the ends of the rotors sealing the spaces between the ends of the rotors and the end walls of said casing.

14. In a rotary engine, a casing, rotors mounted in said casing, intermeshing teeth on said rotors respectively, means for maintaining a liquid seal between said rotors and the seal of the casing in which they are mounted, a movable wall at one end of said rotors, and means for pressing the movable wall into contact with the ends of the rotors. y

15. In a rotary engine, a casing, rotors mounted in said casing, intermeshing teeth on said rotors respectively, means for main' taining a liquid seal between said rotors and the seal of the casing in which they are mounted, a movable wall at one end of said rotors, means for pressing the movable wall into contact with the ends of the rotors, and means for maintaining a liquid seal between the ends of the rotors and said movable wall.

16. In a rotary engine, a casing, rotors mounted in said casing, intermeshing teeth on said rotors respectively, means for maintaining a liquid seal between said rotors and the seal of the casing in which they are mounted, a movable; wall lat one end of said rotors, means for pressing the movable wallinto contact with the ends of the rotors, means for maintaining a liquid seal between the ends of the rotors and said movable wall, and a passage for conduct ing the liquid from said rotors.

17. The combination with a casing, of a pair of rotors revolubly mounted in said casing, vanes on `the periphery of said rotors having grooves therebetween, the vanes of one rotor matching the grooves of the other rotor, pockets formed on the peripheral surface of said vanes, and means for supplying fluid to said pockets to form seals between the rotors, and between the rotors of the walls of the casing in which the rotors are mounted.

18. The combination of acasing, having intersecting cylindrical chambers formed therein, with' apair of rotors mounted in. said easing on parallel axes, teeth on the periphery of said .rotors intermeshi-ng in the space between the cylindrical chambers,

`pockets on the peripheral surfaces of the rotors, means for supplying fluid to said pockets, whereby the contiguous surface of the rotors are sealed and the spaces between the rotors and the cylindrical chamber are sealed.

19. An improvement of the class described, including a pair of rotary members arranged on parallel axes, intermeshing teeth carried by said members, respectively, pockets formed on the peripheral surface of said rotary members, and means for supplying fluid to said pockets for sealing the JOHN o. cansar. 

